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Quantity of water in given mix = \( \Large \frac{10}{100} \times 50 \) = 5 litres. Quantity of milk in given mix. = 50 - 5 = 45 litres.Let x litres of water be added to it. Milk: 45 litres, water \( \Large \left(5+x\right) \) litres Total mix = 50+x litres \( \Large \frac{5+x}{50+x} \times 100 \) = 20 \( \Large \left(5+x\right)5 = 50+x \)5x + 25 = 50 + x4x = 25x = 6.25 6.25 litres of water must be added. Part of solved Mixture and Allegation questions and answers : >> Aptitude >> Mixture and Allegation Comments Similar Questions
The human body can last weeks without food, but only days without water. The body is made up of 50-75% water. Water forms the basis of blood, digestive juices, urine and perspiration, and is contained in lean muscle, fat and bones. As the body can’t store water, we need fresh supplies every day to make up for losses from the lungs, skin, urine and faeces (poo). The amount we need depends on our body size, metabolism, the weather, the food we eat and our activity levels. Water in our bodiesSome facts about our internal water supply include:
Importance of waterWater is needed for most body functions, including to:
Water in our foodMost foods, even those that look hard and dry, contain water. The body can get about 20% of its total water requirements from solid foods alone. The process of digesting foods also produces a small amount of water as a by-product which can be used by the body. Water sourced this way can provide around 10% of the body’s water requirements. The remaining 70% or so of water required by the body must come from fluids (liquids). Recommended dietary fluid intakeThe Australian Dietary recommend that we drink plenty of water but how much is enough? The amount of fluid your body needs each day depends on several factors, such as: How much fluid to drink each day
* from breastmilk or formula These adequate intakes include all fluids, but it’s preferable that the majority of intake is from plain water (except for infants where fluid intake is met by breastmilk or infant formula). Some people may need less fluid than this. For example, people:
Other people might need more fluid than the amount listed and will need to increase their fluid intake if they are:
Although activity levels affect the amount of fluid needed, there are many factors that influence the fluid needs of athletes during training and competition. For example, it is likely that athletes exercising in mild conditions will need less fluid than athletes competing at high intensities in warm conditions. How to get enough fluid in your dietIf the idea of having to drink lots of cups of water a day doesn’t appeal, don’t worry – fluids include fresh water and all other liquids (such as milk, coffee, tea, soup, juice and even soft drinks). Fresh water is the best drink because it does not contain energy (kilojoules) and is best for hydrating the body. Water from the tap is also mostly free and generally available wherever you go. However, milk is about 90% water and is an important fluid, especially for children. Just remember to choose full-fat milk for children under 2 years old and low-fat and reduced-fat varieties for everyone else. Tea can also be an important source of fluid. Tea can help you meet your daily fluid recommendations, and is a source of antioxidants and polyphenols, which appear to protect against heart disease and cancer. If you prefer to get some of your fluids from fruit, aim to eat whole pieces of fresh fruit instead of having fruit juice – you’ll still get the delicious fruity juice (fluids) but you’ll also benefit from the bonus fibre and nutrients while avoiding the extra sugar found in fruit juice. Tips for drinking more water
Limit mineral water intakeCommercially bottled mineral water contains salt, which can lead to fluid retention and swelling, and even increased blood pressure in susceptible people. Limit the amount of mineral water or choose low-sodium varieties (less than 30 mg sodium per 100 ml). If you prefer bubbly water, think about getting a home soda water maker so you can just use tap water and make it fresh when needed. Fluoride in waterAn additional benefit of drinking tap (reticulated or mains) water in Victoria is that, in most areas, fluoride is added to the water. Bottled water does not usually have good levels of fluoride. Fluoridation of tap water helps prevent dental decay and is a safe and effective way of providing dental health benefits to everyone. Find out if your area has water . Avoid sugary and artificially sweetened drinksThe Australian Dietary recommend all Australians to limit their intake of drinks containing added sugar. This includes:
Artificially sweetened drinks add very little energy (kilojoules) to the diet and therefore do not contribute directly to weight gain. However, artificially sweetened drinks still maintain the ‘habit’ of drinking sweet drinks. They may also lead to decreased bone density (as people may drink less milk) and contribute to tooth decay due to their acidity. DehydrationDehydration occurs when the water content of the body is too low. This is easily fixed by increasing fluid intake. Symptoms of dehydrationSymptoms of dehydration include:
If dehydration is not corrected by fluid intake, eventually urination stops, the kidneys fail, and the body can’t remove toxic waste products. In extreme cases, dehydration may result in death. Causes of dehydrationThere are several factors that can cause dehydration including:
Who is at risk of dehydration?Anyone can experience dehydration but there are some people who can be more at risk – such as babies, children and the elderly. Babies and childrenBabies and children are susceptible to dehydration, particularly if they are ill. Vomiting, fever and diarrhoea can quickly cause dehydration. Dehydration can be a life-threatening condition in babies and children. If you suspect dehydration, take your baby or child to the nearest hospital emergency department immediately. Some of the symptoms of dehydration in babies and children include:
Elderly peopleOlder people are often at risk of dehydration due to:
Getting the right balance of fluid intakeNot drinking enough water can increase the risk of kidney stones and, in women, urinary tract infections (UTIs). It can also lower your physical and mental performance, and your salivary gland function, and lead to dehydration. But did you know that it is possible to drink too much water and cause a condition called hyponatraemia (water intoxication)? Water intoxication (hyponatraemia)Drinking too much water can damage the body and cause hyponatraemia (water intoxication), although it is pretty rare in the general population. Hyponatraemia occurs when sodium in the blood, which is needed for muscle contraction and sending nerve impulses, drops to a dangerously low level. If large amounts of plain water are consumed in a short period of time, the kidneys cannot get rid of enough fluid through urine and the blood becomes diluted. Hyponatraemia can lead to:
Hyponatraemia tends to occur in people with particular diseases or mental illnesses (for example, in some cases of schizophrenia), endurance athletes and in infants who are fed infant formula that is too diluted. Fluid retentionMany people believe that drinking water causes fluid retention (or oedema). In fact, the opposite is true. Drinking water helps the body rid itself of excess sodium, which results in less fluid retention. The body will retain fluid if there is too little water in the cells. If the body receives enough water on a regular basis, there will be no need for it to hold onto water and this will reduce fluid retention. Where to get help
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